<style>
    ul.CenterX {
        margin:     0;
        padding:    0.5em;
    }
    ul.CenterX > .Item-Box > small {
        display:    block;
        padding:    0.5em;
    }
</style>
<ul class="CenterX">
    <li class="Item-Box" target="_self" href="html/camera.html">
        <i class="Icon Round Eye Blue_O"></i>
        <small>相机备份</small>
    </li>
    <li class="Item-Box" target="_self" href="html/video.html">
        <i class="Icon Round Screen Purple_O"></i>
        <small>视频点播</small>
    </li>
</ul>